Brake apparatus.



' PATENTED DEC. 22, 1903.

-No. 747,878. I,

P. J. CONBOY.

BRAKE APPARATUS.

APPLICATION FILED AUG, 17, 1903.

H0 MODEL.

Attorney I UNITED STATES Patented December 22, 1903.

PATENT OFFICE.

PHILIP J. CONBOY, OF HAMILTON, OHIO, ASSIGNOR OF ONE-HALF TO WIL- LIAMH. HURM, OF HAMILTON, OHIO.

BRAKE APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 747,378, dated December22, 1903.

Application filed August 17, 1903. Serial No. 169.698. (No model.) I ITo all whom it may concern:

Be it known that I, PHILIP J. CoNBoY, a citizen of the United States,residing at Hamilton, Butler county, Ohio, (post-office address No.334Ludlow street, Hamilton, Ohio,)

have invented certain new and useful Improvements in Brake Apparatus, ofwhich the following is a specification.

This invention pertaining to brake appa- Io ratus will be readilyunderstood from the following description, taken in connection with theaccompanying drawings, in which Figure 1 is a plan of the lower orwinding portion of my improved brake apparatus; Fig. 2, a plan at theplatform-plate, the brakestaff appearing in horizontal section; Fig. 3,an elevation of the apparatus minus the upper portion of thebrake-staff; Fig. 4., a side elevation, part vertical section, of thebrake- 2o handle and its immediate accessories; Fig. 5, an end elevationof the same, and Fig. 6 a plan of the same.

In the drawings, 1 indicates a member of the brake-riggingto be drawnupon in applying the brake, this member being shown as a rod; 2, asheave carried by the end of the rod; 3, one of the winders, which Iwill herein term the first winder, the same being illustrated as arotary cylinder provided witha helical flange adapted for the guidanceof the chain; 4:, a secondwinder disposed near to and parallel with thefirst one and having the same form except as herein indicated; 5, achain looped around sheave 2 and having one end hitched to but notnormally wound upon the second winder 4., the other end of the chainbeing normally wound upon first winder 3 to a greater or less extent; 6,the lower part of the brake-staff fast 0 with the first winder; 7, thespindle of-the .second winder;"8, a volute enlargement at the lower endof the second winder, it being to the larger extremity of thisenlargement that one end of the chain 5 is hitched; 9, a bearing-plateand bracket adapted to furnish a housingfor thelower portion 6 of thebrakestafi and for the spindle of the second winder and adapted to besecured to the platform of the carer other structure in connection withwhich the brake device is to be employed;

10, the upper portion of the brake-stafi ex{ tending from lowerbrake-staff portion 6 upwardly to the brake-handle; 11, a gear fast onupper brake-stafilO and splined on the upperendoflower brake-staff 6;12,a smaller gear on the upper end of the spindle of the second winder,this gear engaging the gear 11; 13, triangular projections from theupper ends of the teeth of. one of the gears and fromthelowerendsoftheteethoftheothergear;l4, 6o

a pawl engaging gear 11 and serving to lock it when desired againstmotion in the non-clockwise direction; 15, a bearing for the upperportion of the upper brake-staff 10; 16, a ratchet fast on the upperbrake-stafi;17, a non-circular head, shown as hexagon, on the upperbrake-staff above the ratchet; 18, a pawlblock journaled on thebrake-staff between the ratchet and the head 17; 19, a pawlcarried bythe brake-block and engaging the ratchet and adapted to turn thebrake-staif in clockwise direction; 20, a pawl-spring carried by thepawl-block; 2 1, a brake-handle having at its inner end a fork adaptedto straddle the pawl block and when raised thereto to fit hexagon head17; 22, a horizontal pivot uniting the fork-arms of the brake-handle tothe pawl-block and serving to support the brake-handlein normalhorizontal position or to permit it to be turned upwardly and over anddownwardly alongside the brake-staff; 23, aportion of the pawl normallyfree of obstruction, but adapted to be engaged by one of the fork-armswhen the brake-handle is turned over and downwardly;

.24, ledges projecting sidewise from the base of the pawl-block andadapted to support the brake-handle in normal position, and 25 a stopupon the upper brake-staff to limit its upward motion. Y p

Consider Figs. 1 and 2, which assume the brake as being off. In applyingthe brake the first winder 3 is by means of the brakehandle turned inclockwise direction. This unwinds the chain from that winder; but as 95the second winder is geared to thefirst winder so as to turn at a higherrate the result is that the chainis wound upon the second winder atgreater rate than it. is unwound from the first winder, and consequentlythe loop of I00 the chain is shortened with great power due .to thedifferential action of the winders. The

volute 8 at the lower end of the second winder may for the present beignored. The chain should in normal condition, with brake off, be fairlyfree from slack, and slack may at any time be taken out of the chain byraising the upper portion 10 of the brake-staff, which may be readilydone by hand, and with it the gear 11, thus disengaging the gears andpermitting extra slack to be wound upon the first brake-winder 3, afterwhich the gears may be rengaged, leaving the aifair in normal workingcondition. The angular projections 13 on the teeth of the gears servewhen the gears are being reengaged to steer the teeth into thetooth-spaces, and thus prevent gear 11 from being arrested in itsdescent by gear 12. The first effect of the brakeapplying motion of thewinders is to take up any slack there may be and then to move thebrake-shoe toward its work and then to forcibly apply the brake to itswork. The first stages call for comparatively little power, and quickaction is desirable, hence the volute engagement at the point where thechain is anchored to the second winder.

In applying the brake the brake-handle is turned in clockwise direction,as has been explained, and the pawl-and-ratchet connection between thebrake-handle and the brakestaff permits the motion to be given to thebrake-stair by oscillating the brake-handle in an obvious and usualmanner; but when the two winders are to be disconnected for the purposeof removing surplus slack from the chain then the brake-staff must beturned in nonclockwise direction, and obviously the pawland-ratchetsystem would defeat this. Provision is therefore made for locking thebrakehandle to the brake-staff. By raising the brake-handle upon itspivot 22 its fork engages hexagon head 17 after the manner of a wrench,and the brake-staif may then be turned positively in either direction.

The brake-handle may be turned up, over, and downwardly alongside thebrake-staff out of the way, and when this is done one arm of the forkforms an obstruction to the portion 23 of the pawl and locks the pawl.

I claim as my invention 1. In brake apparatus, the combination,substantially as set forth, of a first winder, a second winder disposedparallel thereto and connected-therewith for superior winding action, achain hitched to the second winder and wound upon the first winder andarranged to wind upon the second winder as it unwinds from the firstwinder, means for turning said winders, and a sheave engaging the loopof the chain.

2. In brake apparatus, the combination, substantially as set forth, of afirst winder, a second winder disposed parallel thereto, gearingconnecting the two winders to give them a differential winding effect, achain hitched to the second winder and wound upon the first winder andarranged to wind upon the second winder as it unwinds from the firstwinder, means for turning said winders, and a sheave engaging the loopof the chain.

3. In brake apparatus, the combination, substantially as set forth, of afirst winder, a second winder disposed parallel thereto, a chain hitchedto the second winder and wound upon the first winder and arranged towind upon the second winder as it unwinds from the first winder, meansfor turning the first winder, gears connecting the two winders to givethem difierential winding effect, said gears being arranged for relativemotion in an axial direction so that they may be engaged and disengaged,and a sheave engaging the loop of the chain.

4. In brake apparatus, the combination, substantially as set forth, of afirst winder, a second winder disposed parallel thereto and connectedtherewith for superior winding action, a volute enlargement at one endof the second winder, a chain hitched to the volute enlargement of thesecond winder and wound upon the first winder and arranged to wind uponthe second winder as it unwinds from the first winder, means for turningsaid winders, and a sheave engaging the loop of the chain.

5. In brake apparatus, the combination, substantially as set forth,'of afirst winder, a second winder disposed parallel thereto, a chain hitchedto the second winder and wound upon the first one and adapted to windupon the second one as it unwinds from the first one, a sheave engagingthe loop of the chain, detachable gearing connecting the two winders togive them a differential winding effect, a brake-staff connected withthe first winder, a brake-handle on the brake-staff, a pawl and ratchetconnecting the brake-handle with the brake-staif, and means for lockingthe brakehandle to the brake-stafi for giving it motion in eitherdirection.

6. In brake apparatus, the combination, substantially as set forth, of afirst winder, a second winder disposed parallel thereto, a chain hitchedto the second winder and wound upon the first one and adapted to windupon the second one as it unwinds from the first one, a sheave engagingthe loop of the chain, detachable gearing connecting the two winders togive them a differential winding effect, a brake-staff connected withthe first winder, a ratchet fast on the brake-stair, a non-circular headfast on the brake-staff, a pawl-block journaled on the brake-stafi, aspring-pawl carried by the pawl-block and engaging the ratchet, and aforked brake-handle connected with the pawl-block by a pivot at rightangles to the axis of the brake-staff and adapted to engage with anddisengage from said noncircular head.

7. In brake apparatus, the combination, substantially as set forth, of afirst winder, a second winder disposed parallel thereto, a chain hitchedto the second winder and wound upon the first one and adapted to windupon the second one as it unwinds from the first one, a sheave engagingthe loop of the. chain, gles to the axis of the brake-stafi andadaptdetachable gearing connecting the two winded to engage with anddisengage from said ers to give them a difierential winding effect,non-circular head, said brake-handle being a brake-staff connected withthe first winder, adapted to turnover and down alongside the 5 a ratchetfast on the brake-stafi, a-non-eirenbrake staff and to obstructivelylock said :5

lar head fast on the brake-stafi, a pawl-block pawl.

journaled on the brake-staff, a spring-pawl PHILIP J. OONBOY. carried bythe pawl-block and engaging the Witnesses: I ratchet, and a forkedbrake-handle connect- WM. H. HURM,

10 ed with the pawl-block by apivot at right an- J. W. SEE.

